Nut-lock.



No. 718,336. PATENTED JAN. 13, 1903.

1 S. FREUND.

, NUT LOCK.

' APPLIOATION FILED JUNE 2a, 1902. no MODEL.

.l/Illl MIIIIIIIHHHI! g z gyera UNITED, STATES PATENT OFFICE.

SIEGFRIED FREUND, OF CHICAGO, ILLINOIS.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent N 0. 718,336, dated January13, 1903.

Application filed June 23,1902.

T0 alt whom it may concern:

Be it known that I, SIEGFRIED FREUND, a subject of the Emperor ofAustria-Hungary, residing at Chicago, in the county of Cook and State ofIllinois, have invented a new and useful Improvement in Nut-Locks, ofwhich the following is a specification.

My invention relates to an improvement in the class of nut-locks inwhich the locking effect is produced by a washer slidingly engaging witha slot in the bolt to prevent rotation of the washer and alsoengagingwith teeth on the face of the nut to prevent its backwardrotation.

The object of my invention is to provide an improved construction as todetails of the variety of nut-lock referred to, particularly with a viewto shielding the mutually-engaging parts of the washer and nutagainst'the injurious effects of moisture and against accidentalimpairment, as by fracture.

Referring tothe accompanying drawings, Figure 1 shows by a View inelevation my improved nut-lock operatively applied in fastoningfish-plates to the sides of a railway.- rail, as illustrated by a dottedrepresentation. Fig. 2 is an enlarged broken longitudinal section of thethreaded end of the bolt with the nut and washer thereon forming myimproved nut-lock. Fig. 3 is a face view of the nut. Fig. 4 is a sectiontaken at the line 4 on Fig. 3 and viewed in the direction of the arrow.Fig. 5 is a face view of the nut-locking washer. Fig. 6 is a view of thewasher in edge elevation. Fig. 7 is a perspective view of the washershowing one side thereof, and- Fig. 8 is a similar view of the sameshowing the opposite side.

A is the bolt, containing in one side a longitudinal slot 01,, whichextends through the threaded section.

B is the nut, having its face depressed to form therein a housing 79,surrounded by'a flange c, and the base of which is provided withratchet-teeth 01 about the threaded nutorifice e.

O is the annular washer, formed of thin springy steel, having stampedout of the wall about its opening an arc-shaped tongue, and preferably,as shown, two such tongues f and f, the extremities of which are bent toproject beyond the face of the washer, which is designed to engage withthe nut. A guide- Serial No. 112,905. (No model-l finger g is stampedout of the material of the washer about its opening between adjacentends of the tongues ff and is projected for some length at a rightanglefrom the face of the washer opposite that from which the tongues projectto enter the slot a and alford therein an elongated guide havingacomparatively long extent of surface bearing against the opposite wallsof the slot to facilitate its guiding and antibinding function in themovement of the washer.

In the use of my improved device the finger g, by its confinement in thebolt-slot a, locks the washer against rotating on the bolt, and one faceof the washer bears against the nut-flange c, with the tongues ffentering the housing I) and engaging with the teeth (1 on its base tolock the nut against backward rotation. By thus providing the housing I)in the face of the not the teeth thereon, as well as the tongues on theWasher, are shielded against the access of moisture and other exposureand'are thus protected from harm, thereby materially increasing thedurability of the nut-lock.

What I claim as new, and desire to secure slot, a nut screwing on saidbolt and having a depressed face forming a flanged housing, teeth formedon the base of said housing, and a washer having one or more tonguesprojecting from one side into engagement with said teeth and aguide-finger projecting from its opposite side into said bolt-slot,substantially as described.

2. A nut-lock comprising, in combination, a threaded bolt provided witha longitudinal slot, a nut screwing on said bolt and having a depressedface forming a flanged housing, teeth formed on the base of saidhousing, and a washer having tongues projecting from one side intoengagement with said teeth and a guide-finger elongated to project at aright angle from its opposite side into said boltslot and therein forman antibinding guide, substantially as described.

SIEGFRIED FREUND.

In presence of- ALBERT D. BAOOI, A. O. KITTLESON.

